Endovascular Electrical Stimulation - A Novel Hemorrhage Control Technique

Area of Science:

• Biomedical Engineering
• Vascular Surgery
• Electrophysiology

Background:

• Limited external access to blood vessels poses challenges in surgical interventions.
• Inducing localized vasoconstriction is crucial for controlling bleeding and managing vascular conditions.

Purpose of the Study:

• To develop and evaluate a novel endovascular approach for inducing vasoconstriction using pulsed electrical treatment.
• To optimize endovascular electrode design for maximal electric field induction on the arterial wall.

Main Methods:

• Computer simulations were used to optimize endovascular electrode geometries.
• Pulsed electrical treatment was applied to carotid and femoral arteries in sheep.
• Immunohistochemical analysis and histological studies were performed to assess treatment effects and safety.

Main Results:

• Robust vasoconstriction was achieved in sheep carotid arteries, with gradual recovery post-treatment.
• A sevenfold reduction in blood loss was observed with 100% constriction compared to controls (6ml vs 42ml, p<0.001).
• The femoral artery showed less response, potentially due to innervation differences; no adverse effects or significant temperature increases were noted.

Conclusions:

• Endovascular electrical treatment is a viable method for inducing controlled, reversible vasoconstriction.
• This technique shows potential for treating arteries remote from external access.
• Further research may optimize treatment for different arterial types.